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Questions related to R
I am trying to analyze distance data that were collected via line-transect survey method. I was wondering, when you include a categorical covariate in the formula for your key function, do you...
17 January 2019 3,561 4 View
I have records of my species of interest in a specific type of habitat (waterholes) during seasons and over the years. Can i use Occupancy modeling? I need all the help!
15 January 2019 5,305 5 View
In following example, how to use several combination of X, Y and Z in each model? The dataframe looks similar to the following sequence, where Pa = 0/1 and X1 to Zn = several ranges of continuous...
01 January 2019 5,547 2 View
Is there any theoretical guidance for setting up this parameter besides existing methods, e.g., grid search?
01 January 2019 7,900 0 View
Hello, This is to kindly ask if anyone would be willing to share an algorithm or hint me on a R package that calculates the area between two curves? So far, haven't been successful searching,...
01 January 2019 9,360 4 View
Hi, I want to show significant differences in my boxplot (ggplot2) in R. I found how to generate label using Tukey test. However, I'm struggling at placing label on top of each errorbar. Here...
01 January 2019 1,226 6 View
Since 2013, the interest in multilayer networks has been growing quickly. Some studies proposed new algorithms to calculate modularity and detect modules in multilayer networks of different kinds,...
01 January 2019 6,279 3 View
01 January 2019 7,745 3 View
I would like to find a short sequence (25 bp) that does not match anywhere within Human Reference Genome (hg38/hg19) through R scripts. I am not sure if there is a quick solution to do what I...
01 January 2019 3,693 3 View
Hello everyone, I have multiple data sets that contain a large number of species occurrence records, I would like to process these records through an automated coordinate cleaning package in R....
12 December 2018 3,031 2 View
I have a large multi-temporal Landsat dataset (from Landsat 1, 4, 5 and 8) that I need want to quickly pre-process in R-studio. So far, my check in the 'RStoolbox' Package has not yielded...
12 December 2018 9,255 2 View
I'm using the package deSolve in R to model a biological ODE system, however I have the problem of, with certain parameters or with certain initial conditions, the ode solver produces negative...
12 December 2018 6,610 6 View
I have an essay in wich I study the way a product is applied (Aplicación) and the product itself(Químico), the interaction (Tratamiento) and the block (Y) When i do an aov in R the degrees of...
12 December 2018 263 2 View
Dear Colleagues, can you give me some examples of using XGBoost algorithm with cross-validation in R to predict time series?
12 December 2018 7,797 2 View
10 December 2018 7,192 6 View
In a regular ggplot2 implementation, alpha level, say in geom_point(), is applied on all data points irrespective of their degrees of overlapping. If I want to apply alpha only on overlapped data...
18 November 2018 1,734 4 View
11 November 2018 7,035 5 View
I'm starting a PVA to assess viability of a griffon vulture population under several scenarios. Starting point is population size, which I'm trying to assess also with rarefaction analysis (e.g....
11 November 2018 1,766 1 View
Hi everybody! I am doing logistic regression models using R. I am checking the results with Stata. Regrettably, I can't test goodness of fit with Hosmer Lemeshow in R; this is quite sad because I...
11 November 2018 9,012 0 View
I am currently trying to estimate game bird population size using distance sampling. Many of my observations include multiple birds, so I need to analyze my detection "objects" as clusters. I'm...
11 November 2018 4,686 3 View
the multivariate regression model in R platform is like: lm(a~b+c, data=sampleset) where a is dependent variable and b, c are independent variable, if I want o deploy another variable, say d, in...
11 November 2018 9,719 1 View
Hey, I am having trouble with finding the right statistical test for my data. I have a frequency of two types HMA and LMA and their morphologies. First i thought that the chi squared test was the...
11 November 2018 309 14 View
02 November 2018 1,441 13 View
Hi, I'm working on a data that each sentence is in separate rows in dataframe. I want to determine word frequency in each row with a word list that I have created. Then I would like to add these...
29 October 2018 5,782 10 View